Chen caerulescens, [133];
C. hyperboreus, [133];
C. nivalis, [133];
fossil, [136];
C. aegyptiaca, [129];
C. jubata, [129];
C. sirabensis, fossil, [137]
Chen caerulescens, [133];
C. hyperboreus, [133];
C. nivalis, [133];
fossil, [136];
C. aegyptiaca, [129];
C. jubata, [129];
C. sirabensis, fossil, [137]